Cam & engine gurus gtf in her meow!

... what I thought was a very very mild cam.

It is, but your truck is heavy..
That cam will give you some sound, and you may not hate it. But it's just big enough to be a dog off the line unless you give it a little help.. You won't need 5k stall and 4.10s, but it will take something to not make it slower than stock.

You may even be OK with it, but it's tough to say it will be a "good" combo. As has been said, we've all gone too big and wished for less. But if your expectations aren't high and you don't mind tinkering and aren't against the idea of a new converter at some point, go with the cam and think about advancing it a few more degrees. It's not as if you can't undo anything you're doing and cams are cheap (relatively).

If you take the advice here and go smaller, you may not get as much of the noise you want and find that the change in low end is acceptable and you'll regret not using this one.. So no matter what, you risk regret. Question is, how much of it can you afford? ;)